Why vBulletin ?

I know that vBulletin is very cool (and made in PHP), but i also know it is not free !
So the other day i was browsing ... and came accross forums that look almost like the vBulletin ... but ... are FREE !
Check them out here : http://www.invisionboard.com/
And they look really great !

Staff: Admin

Other boards don't have even close to as many features as vB. Also the support is unmatched. I do like the way vB is coded and organized. mkaku.org forums used to be invision, but they just switched to vB.

Invision is also still in alpha and isn't a commercial product that can scale easily.